Type bed of printing machines



Sept. 17, 1929 .1. N. BANKS TYPE BEDOF PRINTING MACHINES Filed Nov. 16', 192B 3 Sheets-Sheet 1 Sept. 17, 1929. J. N. BANKS TYPE BED 0F PRINTING MACHINES Filed Nov. 16, 1928 3 Sheets-Sheet 2 Sept. 1-7, 1929. J. N. BANKS TYPE BED OF PRINTING MACHINES Filed Nov. 16, 1928 3 Shgets-Sheet 3 Patented Sept. 17, 1929 UNITED STATES PAT-Eur Yo FlcE JOHN NELSONBANKS, or wns'r wvooivrnn, ENGLAND, AssrG oR 'ro Lmorrrn AND MACHINERY LIMITE or LONDON, ENGLAND TYPE BED OF PRINTING MACHINES This invention relates to the type-beds of bed-and-cylinder printing machines, and has for its object to provide an improved construction of such beds particularly adapted 5 for carrying two type forines, one near each end of the bed or on respectively opposite sides of the transverse centre of the bed.

The improved construction of bed is especially useful in connection with perfector 10 and two-colour'machines where the bed cooperates with impression cylinders, disposed approximately centrally of the mach1ne, for printing, in the case of a perfector machine, an impression from one forme on one side of a sheet, and from the other forms on the opposite side of the same sheet. chines of this kind as at present in use, only one half of the bed'is accessible at any one time for the locking up of the respect ve forms, when the bed is at one end of its reciprocation, the other half of the bedbeing at that time located mainly beneath the printing cylinders. Consequently, when one forme has been placed in position on the bed, 5 the latter must be moved to the opposite end of its reciprocation so that it may be exposed at the opposite side of the printing cylinders for the locking up of the second forme. This involves loss of time in prepar- 9 ing the press for a run, which the present invention proposes to obviate by providing for both halves of the bed to be accessiblesimul taneously.

To this end, according to the present in vention, the bed is divisible into two readily detachable portions, which can be independently moved to opposite sides of the printing cylinders, and means are provided forrigidly locking together thetwo portions'of the bed, as well as for ensuring rigid engagement or" one of the bed portions withthe rack hanger attached tion. I

The invention will now be described by reference to the accompanying drawings which, as an example,-illustrate one construc- I tional form thereof.

In these draw1ngs:

Figure 1 is an elevation of sufficient of a' In mm to the other bed-poi 319,858, and in Great Britain December 2, 19 27. '7

side, to show the embodiment therein of the present improvements, the two portions of the type-bed being here shown, separated from each other;

Figure 2 is a side elevation showing the type-bed portions in working relation;

Figure 3 is a plan of Figure 2;

Figure 4 is a transverse section of the typebed, and 4 I Figures 5 and 6 are sections taken respec tively on the lines 55 and 6-6 of Figure 3 drawn to a largerscale. 1

1 represents one of thetwo side frames, viz: that of the feeder side of the machine, and 2, 2 the two printing cylinders mounted therein.

The machine frame, as ordinarily, is pro' vided with tracks or ways supporting rollers whereon the tracks or rails 3 of the type-bed travel in the ordinary well-known manner;

the ways and rollers are not shown 'inthe dliLWlIlgS as they are'not necessary to an understanding of the invention.

Instead of the type-bed being, as ordinarily, formed of two permanently'con The inter-engaging rails 6, 7 are bolted to the respective bed portions 4, 4 as shown best in Figure 6. The rail 6 secured to the bed portion 4by bolts 9, is formed with recesses 6 (Figure 3), for receiving lugs 7 Intergral with the rail 7 which is secured to the bed portion 4 by bolts 10. I Beneaththe rail 7 and rigidly secured to the bed port-ion 4 by bolts 11 is a bar 12, having lugs 13 housed in recesses formed in the under side ofthe rail 6, said lugsbeing threaded for receiving the lower ends of the bolts 8, as shown best in Figure 5.

Holes in the lugs7 co-ax'ial with those in the lugs 13, receive with an accurate fit, the upper cylindrical parts of the bolts or dowels 8, while the conical portions of said bolts below these cylindrical parts, nest firmly in correspondingly coned holes in the rail 6. The bolts 8, at their upper ends, terminate in square heads 8 with which, keys or spanners can be engaged for turning said bolts when it is required to disconnect or connect the two bed portions 4:, 4i. i

The rails 6, 7, are provided respectively with upwardly projecting, bars 6 7 for the locking up of the forms on'the respective type-bed portionsd, i

The rack hanger l-it is of substantially the usual form and is permanently attached to. the bed portion 4, while the bed portion 4 is readily detachable from the said rack hangerand is provided with-means whereby, when the two bed portions are secured together by the bolts 8, it is accurately clamped to said rack hanger. In the example illustrated, these means consist of three dogs 15 which are rigidly bolted to the underside of the bed portion l and as shown in Figure 2, have inclined surfaces or jaws 16 adapted to engage with correspondingly inclined surfaces. formed on the ack hanger.

When, after the removal of the bolts or dowels 8, the two bed portions 4, 4, are moved apart, the dogs 15 separate from the engaging parts of the rack hanger 1d, and When the two said portions are next. brought together, the said dogs firmly engage with the rack hanger, so that, after, uniting the bed portions together by the bolts or dowels 8, the machine can be operated as though the bed were in one indivisible whole.

Having described my invention, I declare that what I claim and desire to secure by Letters Patent is '1. In a printing machine, the combination with a type-bed formed of separate portions, or means adapted to secure said portions together with a capacity for their ready disconnection to enable them when so disconnected. to be moved horizontally one away "from the other.

2. In a printing machine, the'combination with a type-bed formed ofseparate porions, of means adapted to secure said portions together with a capacity for their ready disconnection to enable them when so disconnected, to be moved horizontally one away from the other, and registering means on the meeting edges ofthebed portions mutually engaging with each other to ens "e accurate positioning and attachment one relatively to another.

3. In a printing machine, the combination with a type-bed formed of separate portions, of interengaging lugs and recesses of the respective bed portions, and bolts revices permanently attaching the rails to the meeting edges of adjacent bed portions, and tonne locking up bars integral with the said was and projecting upwards beyond the upper face of the bed portions.

5. In a printing machine, the combination with a type-bed formed of separate portions, of interengaging lugs and recesses of the respective bed portions, bolts removable from the top of the type-bed, having threaded parts engaging one of the bed portions and conical parts engaging the adjacent bed portion, rails independent ofthe respective bed portions, securing devices permanently attacl'iing the rails to the meeting edges of ad acent bed portions, and forme locking up bars integral with the said rails and projecting upwards beyond the upper face of the bed portions.

6. in a printing machine, the combina tion with a type-bed formed of separate portions. of interengaging lugs and recesses of the respective bed portions, bolts removable from the top of the type-bed, having threaded parts engaging one of the bed portions and conical parts engaging the adjacent bed portion, a rack hanger permanently attached to one of the bed portions, and attaching means on an adjacent bed portion admitting this last named bed portion being readily connected to and disconnected trom the hanger.

'Z. In a printing machine, the combination with a type-bed formed of separate portions, of means adapted to secure said portions together with a capacity for their ready disconnection to enable them when so disconnected, to be moved horizontally one away from the other, rails independent of the respective bed portions, securing devices permanently attaching the rails to the meetingv edges of adjacent bed portions, tonne locking up bars integral with the said rails and projecting upwards beyond the upper face olithe bed portions, a rack hanger permanently attached to one of the bed portions, and attaching means on an adjacent bed portion admitting this last named bed portion being readily connected to and disconnected from the hanger.

In witness whereof I have afiixed my signature hereto.

JOHN NELSON BANKS. 

